In this paper, the results obtained in the synthesis of thioamides and α-ketothioamides by a modification of the Willgerodt–Kindler reaction, under solvent-free and noncatalyst conditions using IR energy as a source of activation, are presented. The use of IR energy in these reactions has been shown to lead to a mixture of thioamide and α-ketothioamide as the main products in most cases, with the latter predominating. The yields of α-ketothioamides from most of these reactions are better than those reported previously. To the best of our knowledge, this is the first time that IR energy has been applied to promote the Willgerodt–Kindler reaction.
在这篇论文中,通过对Willgerodt-Kindler反应进行改进,在无溶剂和非催化剂条件下利用红外能作为激活源合成了硫代酰胺和α-酮硫代酰胺。这些反应中使用红外能已被证明通常会导致硫代酰胺和α-酮硫代酰胺的混合物作为主要产物,后者占主导地位。这些反应中大多数情况下得到的α-酮硫代酰胺产率优于先前报道的结果。据我们所知,这是首次应用红外能促进Willgerodt-Kindler反应。